EEG Alpha Power Is Modulated by Attentional Changes during Cognitive Tasks and Virtual Reality Immersion

Figure 3

Scalp maps of alpha power (μV²) averaged across all participants in Experiment 1, as a function of the experimental session (arithmetic session: first row; reading numbers session: second row) and of the phase within the session (relaxation pretask r1: first column; task T: second column; relaxation posttask r2: third column). Each scalp map was obtained via the EEGLAB Matlab Toolbox, by color coding the average alpha power value at each electrode position in a 2D circular view (top view of the head, nose at the top) and using interpolation on a fine 67 × 67 grid. (a) Arithmetic session (r1 phase). (b) Arithmetic session (T phase). (c) Arithmetic session (r2 phase). (d) Reading numbers session (r1 phase). (e) Reading numbers session (T phase). (f) Reading numbers session (r2 phase).

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